Hello, I’m Nathan, and I’ll be assisting you today.My livelihood depends on your positive feedback, so your satisfaction is my highest priority.This symptom can indicate several possible issues: an internal hardware failure, a low/faulty battery, or just a simple memory/firmware glitch.The first step here will be to attempt to reboot the nook. This is done by pressing/sliding and holding the power button for 30+ seconds, then release. Give the nook about a minute to start back up, and let me know if the problem persists, we can then try some further steps.Nathan